Core vent and support



C. J. BECK.

CORE VENT AND SUPPORT.

APPLICATION z'iLED NOV. 13, I920.

1,41 3,566. Patented pr- 25, 1922.

2 SHtETS-SHEET l.

mum M01. 6701mm tZBEcn,

351 1114/ gjtozwzaz. I

C. J. BECK.

CORE VENT AND SUPPORT.

APPLICATION FILED NOV-13.1920.

Patented Apr. 25, 1922.

2 SHtETSSHEET 2.

3 VI v0 1410's. C/mm EJJB CHARLES J. BECK OF WATERBURY, CONNECTICUT, ASSIGNOR TO THE SHOE HARD- WARE COMPANY, A CORPORATION OF CONNECTICUT.

CORE VENT AND SUPPORT.

I Specification of Letters Patent. Patented A 25 1922;

Application filed November 13, 1920. Serial No. 423,899.

To all 20 horn it may con cera- Be it known that 1, CHARLES J. BECK, a citizen of the United States, residing at Waterbury, county of New Haven, and State of Connecticut, have invented a certain new and useful Core'Vent and Support, of which the folhowing is a full, clear, and exact description.

This invention relates to a core vent and support, more particularly to a means for venting the core of a footwear last and supporting the corein a mold. It is especially applicable to the supporting and venting of the core of the forward or toe portion of a sectional interlocking boot tree.

It has previously been proposed to vent the cores of footwear lasts by mean/s of curved perforated metal tubes inserted in the core, but the use of such devices is expensive, and considerable manipulation is required to withdraw the vent-tube in order to remove the core from the last.

An object of my invention is to provide .a simple, economical and efficient means for venting a core, which means at the same time acts to support the core in the mold.

Another object of my invention is to provide a readily rupturable venting means which is not affected by the heat in the cast? ing operation, and which is quickly removed from the article cast by merely breaking it away. v

Still another object is to provide a frangible means for venting and supporting a core in a mold, which is socheap that it may be discarded after breaking up in removing a casting from a mold.

For a full disclosure of the invention reference is had to the accompanying specification .and drawings, inv which latter.

Fig. 1 is a horizontal sectional view of the forward or toe section of a boot-tree or last. Fig. 2 is a vertical sectional view on the line 2 2 of Figure 1;

Figure 3 is a elevation of the chill; and Figure 4 is a section of a modification showing a one piece tree or last.

Referring to Figures, 1 to 30f the drawings the numeral 1- represents the lower half of a mold, .and 2 the upper half, a chill 3 and the core 4 being inserted between the halves, and a pour-hole 5 being also provided between the halves. A chaplet 6 is secured in the core with its outer end resting between the halves of the mold. 'As an additional means forsupporting the core and also venting it one or more tubes 7, preferably of asbestos, are inserted in the core and when the core is assembled with thechill are adapted to project into openings 8 in the chill. The face of the chill adjacent the core 1s provided with a dove-tail rib 9 which is adapted to contact with the rear face of the 'core, and a substantially semi-circular flange 10 at the upper end of the rib is adapted to rest upon the upper face of the core. At its lower portion the rib 9 is stepped .as shown at 11 in Figure 1. The poured metal between the mold and core is indicated by reference numeral 12.

In the foregoing description the invention is disclosed as applied to a sectional boot tree in which the sections are interlocked by a dove-tail rib and groove, but the invention may also be applied to a one-piece tree or last as shown inxFigure 4:, in which the numeral 13 represents the lower half of a mold and 14 a core supported therein by the chaplets 15. Leading from the upper portion of the core and extending into the mold is an asbestos vent tube 16, which also acts as a supportfor the core. A pour-hole is indicated at-17 and the poured metal between the mold and last is designated by numeral 18.

In operation the core 4, which has been built up with, the asbestos tubes 7 therein,

is connected to the .chill 3 by inserting the tubes 7 in the bores 8, the rear surface of the core being disposed in contact with the dove-tail rib 9, and its upper surface in contact with the semi-circular flange 10. The core, chill and'chaplet .6 are then properly positioned in the lower half of the mold, the upper half superposed thereon, and the casting operation performed in the ordinary manner by pouring through the hole 5. The

tubes 7 may be extended entirely through the chill and into the mold. Any material which is unaffected by the heat of the casting operation and possesses sufiicient strength while yet being readily rupturable may be used for the tubes 7, but it has been found that asbestos ossesses all the desired qualities and is re atively cheap, so that after use the broken tubes may be thrown away. \Vhile in the present instance two tubes have been shown, the number of them may, of course, be modified'to suit the circumstances. The chill 3 may be made of aluminum, in order 'to secure lightness, and the dove-tail rib 9 and flange 10 of steel or other suitable metal. Any suitable form of chill may be used, or the chill may be omitted and the tubes 7 imbedded directly in the mold as in the form shown in Fig. 4.

While aspecific embodiment has been shown and described the invention is not limited to the form disclosed and is capable of general application to the venting and sup orting of cores in molds.

aving thus described my invention, what I claim and desire to protect by Letters Patent is:

1. In combination, a core, and a readily rupturable venting means extending from the core.

2. In combination, a core, a mold. and a readily rupturable supporting and venting means extending from the interior of the core and adapted to vent the core through the mold.

3. In combination,,a core, and a readily rupturable tubular venting means extending from the interior of the core and composed of a material unaffected by the heat to which it is exposed.

4. In combination, a core, a mold, a chill interposed between the two, and a readily rupturable venting means for leading the gases from the core through the chill and into the mold 5. In combination, a core and an asbestos venting tube leading from the interior thereof.

6. In combination, a core, asbestos venting tubes leading from the interior thereof, a chill, and openings in said chill adapted to receive said tubes, to thereby vent the gases from said core.

7. In combination. a core, a mold. and a plurality of means for supporting the core in the mold, certain of said means being readily rupturable and hollow to vent the core.

8. In combination. a core, a mold, a chill interposed between the two at one side of the core. means for supporting the core in the mold, and means for supporting the core from the chill, said last means including a plurality of asbestos tubes extending from the interior of the core through the chill.

9. In combination, a core, a mold. and a readily frangible core venting means extending between said parts, whereby after pouring the casting and venting means may be separated by breaking the venting means,

10. In combination, a core, a mold, and a readily frangible relatively infusible core venting means extending between said parts whereby, after pouring the casting and mold may be separated by breaking the vent-ing means.

Signed at \Vaterbury, Connecticut. this fourth day of November 1920.

CHARLES J. BECK.

\Vitness:

H. E. C. JUDGE. 

